Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd946c2a230d068…

MALICIOUS

PDF

44.2 KB Created: 2021-06-11 02:32:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f8ae938e70a875830bde392ed9481045 SHA-1: b073bea07e629ee9305876f465ab6dc0e47886ac SHA-256: 2cd946c2a230d0688c1840d7aa5927a64b955b01098a1493ea1fa2b1eb4159c0
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing and a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/how-to-hack-roblox-jailbreak-with-game-hack.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.tw/app/431946152/how-to-hack-roblox-jailbreak-with-game-hack PDF link annotation
    • https://sensorcamera-tw.com/upload/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-assassin-cheat-codes_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/win-free-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-hack-gg-uardikan_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-studio-free_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-free-robux-script-pastebin_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5157 23872 bytes
SHA-256: d7fa004258296baa4e47f75611c5023b0c2112b906cd226690e8586be8ad43ac
font_01_sfnt_off00008786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8786 19100 bytes
SHA-256: 2c267fae2845afe0c1490dfdd75dce6200a3a6658597077226fb652e83169060

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